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  1. 19 12月, 2017 3 次提交
  3. 05 9月, 2017 1 次提交
  5. 04 9月, 2017 1 次提交
  7. 17 7月, 2017 1 次提交
  9. 11 7月, 2017 1 次提交
  11. 26 6月, 2017 2 次提交
  13. 20 6月, 2017 1 次提交
  15. 16 6月, 2017 1 次提交
  17. 09 5月, 2017 3 次提交
  19. 28 4月, 2017 1 次提交
  21. 24 4月, 2017 1 次提交
  23. 11 4月, 2017 2 次提交
  25. 03 4月, 2017 1 次提交
  27. 07 3月, 2017 9 次提交
  29. 01 3月, 2017 1 次提交
    • K
      block: Add BDRV_O_RESIZE for blk_new_open() · 55880601
      由 Kevin Wolf 提交于 
      blk_new_open() is a convenience function that processes flags rather
than QDict options as a simple way to just open an image file.

In order to keep it convenient in the future, it must automatically
request the necessary permissions. This can easily be inferred from the
flags for read and write, but we need another flag that tells us whether
to get the resize permission.

We can't just always request it because that means that no block jobs
can run on the resulting BlockBackend (which is something that e.g.
qemu-img commit wants to do), but we also can't request it never because
most of the .bdrv_create() implementations call blk_truncate().

The solution is to introduce another flag that is passed by all users
that want to resize the image.
Signed-off-by: NKevin Wolf <kwolf@redhat.com>
Acked-by: NFam Zheng <famz@redhat.com>
Reviewed-by: NMax Reitz <mreitz@redhat.com>
      55880601
  31. 21 2月, 2017 2 次提交
  33. 01 2月, 2017 5 次提交
  35. 04 1月, 2017 1 次提交
  37. 22 11月, 2016 1 次提交
    • E
      block: Return -ENOTSUP rather than assert on unaligned discards · 49228d1e
      由 Eric Blake 提交于 
      Right now, the block layer rounds discard requests, so that
individual drivers are able to assert that discard requests
will never be unaligned.  But there are some ISCSI devices
that track and coalesce multiple unaligned requests, turning it
into an actual discard if the requests eventually cover an
entire page, which implies that it is better to always pass
discard requests as low down the stack as possible.

In isolation, this patch has no semantic effect, since the
block layer currently never passes an unaligned request through.
But the block layer already has code that silently ignores
drivers that return -ENOTSUP for a discard request that cannot
be honored (as well as drivers that return 0 even when nothing
was done).  But the next patch will update the block layer to
fragment discard requests, so that clients are guaranteed that
they are either dealing with an unaligned head or tail, or an
aligned core, making it similar to the block layer semantics of
write zero fragmentation.

CC: qemu-stable@nongnu.org
Signed-off-by: NEric Blake <eblake@redhat.com>
Reviewed-by: NMax Reitz <mreitz@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>
      49228d1e
  39. 28 10月, 2016 2 次提交